Patents by Inventor Hiroya Komiyama
Hiroya Komiyama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6868663Abstract: A gas turbine plant includes a combustion section, a turbine section, an exhaust section, a temperature detecting unit, and a monitoring unit. The combustion section combusts fuel using air to generate combustion gas. The turbine section is driven with the combustion gas from the combustion section. The exhaust section is connected to the turbine section to exhaust the combustion gas from the turbine section. The temperature detecting unit is provided in the exhaust section to measure a temperature of the combustion gas. The monitoring unit generates a warning signal based on a tolerable level and data corresponding to a temporal change of the temperature measured by the temperature detecting unit to indicate an extraordinary state of the gas turbine plant.Type: GrantFiled: April 2, 2004Date of Patent: March 22, 2005Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Shouichi Nagata, Hiroya Komiyama
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Patent number: 6810669Abstract: This invention provides a clutch engagement detecting apparatus, which can accurately detect the state of engagement of a clutch using a helical spline engagement structure, and a single-shaft combined plant having it, and is constructed as follows: If the difference between the detected value of the rotational speed of a gas turbine and the detected value of the rotational speed of a steam turbine is not more than a detection error by the time a predetermined time elapses after load is charged into the steam turbine, it is determined that the clutch is engaged.Type: GrantFiled: May 20, 2003Date of Patent: November 2, 2004Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Satoshi Tanaka, Yoshiyuki Kita, Masaaki Yamasaki, Hiroya Komiyama
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Publication number: 20040182067Abstract: A gas turbine plant includes a combustion section, a turbine section, an exhaust section, a temperature detecting unit, and a monitoring unit. The combustion section combusts fuel using air to generate combustion gas. The turbine section is driven with the combustion gas from the combustion section. The exhaust section is connected to the turbine section to exhaust the combustion gas from the turbine section. The temperature detecting unit is provided in the exhaust section to measure a temperature of the combustion gas. The monitoring unit generates a warning signal based on a tolerable level and data corresponding to a temporal change of the temperature measured by the temperature detecting unit to indicate an extraordinary state of the gas turbine plant.Type: ApplicationFiled: April 2, 2004Publication date: September 23, 2004Applicant: MITSUBISHI HEAVY INDUSTRIES LTD.Inventors: Shouichi Nagata, Hiroya Komiyama
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Patent number: 6782691Abstract: A gas turbine plant includes a combustion section, a turbine section, an exhaust section, a temperature detecting unit, and a monitoring unit. The combustion section combusts fuel using air to generate combustion gas. The turbine section is driven with the combustion gas from the combustion section. The exhaust section is connected to the turbine section to exhaust the combustion gas from the turbine section. The temperature detecting unit is provided in the exhaust section to measure a temperature of the combustion gas. The monitoring unit generates a warning signal based on a tolerable level and data corresponding to a temporal change of the temperature measured by the temperature detecting unit to indicate an extraordinary state of the gas turbine plant.Type: GrantFiled: April 9, 2002Date of Patent: August 31, 2004Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Shouichi Nagata, Hiroya Komiyama
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Publication number: 20040011040Abstract: This invention provides a clutch engagement detecting apparatus, which can accurately detect the state of engagement of a clutch using a helical spline engagement structure, and a single-shaft combined plant having it, and is constructed as follows: If the difference between the detected value of the rotational speed of a gas turbine and the detected value of the rotational speed of a steam turbine is not more than a detection error by the time a predetermined time elapses after load is charged into the steam turbine, it is determined that the clutch is engaged.Type: ApplicationFiled: May 20, 2003Publication date: January 22, 2004Inventors: Satoshi Tanaka, Yoshiyuki Kita, Masaaki Yamasaki, Hiroya Komiyama
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Patent number: 6609379Abstract: A gas turbine plant for limiting a sudden increase of load of the gas turbine, i.e., of the amount of fuel, and suppressing a stress of the turbine, or for maintaining a suitable fuel-air ratio is disclosed. The plant includes a controller comprising a section for calculating a governor signal for controlling the degree of opening of the fuel valve, based on a revolution speed of the gas turbine; and a section for calculating a load-limiting signal for following the governor signal, wherein when the governor signal decreases, the load-limiting signal is larger than it by a predetermined value, while when the governor signal increases, the increase rate of the load-limiting signal has a predetermined upper limit. The controller also comprises a limiting section, into which both signals are input, for limiting the upper value of the governor signal by using the load-limiting signal as an upper limit.Type: GrantFiled: February 20, 2003Date of Patent: August 26, 2003Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Shouichi Nagata, Hiroya Komiyama
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Publication number: 20030121267Abstract: A gas turbine plant for limiting a sudden increase of load of the gas turbine, i.e., of the amount of fuel, and suppressing a stress of the turbine, or for maintaining a suitable fuel-air ratio is disclosed. The plant includes a controller comprising a section for calculating a governor signal for controlling the degree of opening of the fuel valve, based on a revolution speed of the gas turbine; and a section for calculating a load-limiting signal for following the governor signal, wherein when the governor signal decreases, the load-limiting signal is larger than it by a predetermined value, while when the governor signal increases, the increase rate of the load-limiting signal has a predetermined upper limit. The controller also comprises a limiting section, into which both signals are input, for limiting the upper value of the governor signal by using the load-limiting signal as an upper limit.Type: ApplicationFiled: February 20, 2003Publication date: July 3, 2003Inventors: Shouichi Nagata, Hiroya Komiyama
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Patent number: 6539722Abstract: A gas turbine plant for limiting a sudden increase of load of the gas turbine, i.e., of the amount of fuel, and suppressing a stress of the turbine, or for maintaining a suitable fuel-air ratio is disclosed. The plant includes a controller comprising a section for calculating a governor signal for controlling the degree of opening of the fuel valve, based on a revolution speed of the gas turbine; and a section for calculating a load-limiting signal for following the governor signal, wherein when the governor signal decreases, the load-limiting signal is larger than it by a predetermined value, while when the governor signal increases, the increase rate of the load-limiting signal has a predetermined upper limit. The controller also comprises a limiting section, into which both signals are input, for limiting the upper value of the governor signal by using the load-limiting signal as an upper limit.Type: GrantFiled: July 20, 2001Date of Patent: April 1, 2003Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Shouichi Nagata, Hiroya Komiyama
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Patent number: 6477842Abstract: A gas turbine control apparatus for a single-shaft type combined cycle power plant is provided by which gas turbine output is accurately computed during a circulating water reversing wash operation. Vacuum down amount is computed from a generator output signal (31) immediately before the mentioned reversing wash operation and is corrected by being multiplied by a valve opening correction factor computed from a condenser reversing valve opening signal (41) and a sea water temperature correction factor computed from a condenser reversing valve inlet sea water temperature signal (47). A condenser vacuum at the time of the reversing wash operation is computed by the corrected vacuum down amount being subtracted therefrom. A vacuum correction factor is computed based on the computed condenser vacuum.Type: GrantFiled: July 30, 2001Date of Patent: November 12, 2002Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Shouichi Nagata, Hiroya Komiyama
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Publication number: 20020149485Abstract: A gas turbine plant includes a combustion section, a turbine section, an exhaust section, a temperature detecting unit, and a monitoring unit. The combustion section combusts fuel using air to generate combustion gas. The turbine section is driven with the combustion gas from the combustion section. The exhaust section is connected to the turbine section to exhaust the combustion gas from the turbine section. The temperature detecting unit is provided in the exhaust section to measure a temperature of the combustion gas. The monitoring unit generates a warning signal based on a tolerable level and data corresponding to a temporal change of the temperature measured by the temperature detecting unit to indicate an extraordinary state of the gas turbine plant.Type: ApplicationFiled: April 9, 2002Publication date: October 17, 2002Applicant: MITSUBISHI HEAVY INDUSTRIES LTD.Inventors: Shouichi Nagata, Hiroya Komiyama
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Publication number: 20020011063Abstract: A gas turbine plant for limiting a sudden increase of load of the gas turbine, i.e., of the amount of fuel, and suppressing a stress of the turbine, or for maintaining a suitable fuel-air ratio is disclosed. The plant includes a controller comprising a section for calculating a governor signal for controlling the degree of opening of the fuel valve, based on a revolution speed of the gas turbine; and a section for calculating a load-limiting signal for following the governor signal, wherein when the governor signal decreases, the load-limiting signal is larger than it by a predetermined value, while when the governor signal increases, the increase rate of the load-limiting signal has a predetermined upper limit. The controller also comprises a limiting section, into which both signals are input, for limiting the upper value of the governor signal by using the load-limiting signal as an upper limit.Type: ApplicationFiled: July 20, 2001Publication date: January 31, 2002Inventors: Shouichi Nagata, Hiroya Komiyama